Steve and All, I rejected the shipment and asked for replacement with good
boards , not reworked boards, but supplier is unable to provide quick
replacement. the PWB is 1+4+1 used for cellphone application.
At 06:28 AM 9/16/2005 -0500, Stephen R Gregory wrote:
> I haven't woke-up yet, strike that last
> question.
>
> You said you already recieved the boards...
> so you would know if you got new ones or not.
>
> Kind regards,
>
> -Steve Gregory-
> Senior Process Engineer
> LaBarge Incorporated
> Tulsa, Oklahoma
> (918) 459-2285
> (918) 459-2350 FAX
>
>
>
>
>
> Stephen R Gregory/LABARGE@LABARGE
> Sent by: TechNet <[log in to unmask]>
> 09/16/2005 06:16 AM
> Please respond to TechNet E-Mail Forum
> <[log in to unmask]>; Please respond to Stephen R Gregory
>
> To: [log in to unmask]@SMTP@Exchange
> cc: (bcc: Stephen R Gregory/LABARGE)
> Subject: Re: [TN] Rework for Delaminated PWBs
>
>
> Mornin'
> Everybody!
>
> I have
> the pictures that Mumtaz sent me posted now. Go to:
>
>
>http://www.stevezeva.homestead.com and click on "Picture Page 2"
> and look
> at; "Blister 1, Blister 2, After Bake 1, and After Bake 2".
>
> Boy,
> that's some SERIOUS delamination! I don't know enough to say
> if the
> rework that your supplier is proposing is acceptable, but my first
> question
> would be is why would they send you boards that are not cured?
>
> If they
> sent you boards that are that undercured, what else is wrong with
> these boards?
>
> I would
> have a very hard time accepting these boards. Which brings up
> another
> question, if you say you won't accept them and that you want new
> boards,
> how will you know that you won't get the same boards that your
> supplier
> has "reworked"?
>
> Kind regards,
>
> -Steve
> Gregory-
> Senior
> Process Engineer
> LaBarge
> Incorporated
> Tulsa,
> Oklahoma
> (918)
> 459-2285
> (918)
> 459-2350 FAX
>
>
>
>
>
> Mumtaz Bora
> <[log in to unmask]>
> Sent by: TechNet
> <[log in to unmask]>
> 09/15/2005 08:20 PM
> Please respond to
> TechNet E-Mail Forum <[log in to unmask]>; Please respond to Mumtaz Bora
> <[log in to unmask]>
>
> To: [log in to unmask]@SMTP@Exchange
> cc: (bcc: Stephen R
> Gregory/LABARGE)
> Subject: [TN] Rework for
> Delaminated PWBs
>
>
> Dear
> Technetters,
>
>
> We have
> received a large batch of PWBs that is showing delamination after
> reflow at
> peak temp. 230C. Laminate is high Tg - 170C.
>
> Supplier
> is proposing to perform the following rework -- on these boards
> instead
> of providing replacement parts.
>
> Oven
> bake at 190C for 2.5 hours followed by second bake at 150C for 2
> hours at
> 6kg/cm2 pressure. Will this guarantee a full cure?
>
> I am
> concerned about latent failures and layers opening up as full cure was
> not
> achieved the first time.
>
> Any
> inputs from the forum will be appreciated.
>
> I will
> request Steven Gregory to place the image of delamination on his
> website.
> Have a great weekend.
> Thank-you
>
> Mumtaz
>
> D/ 252
> - SMT Process and Component Quality
> Bldg. V238E
> Voice
> (858)-882-1967
> Fax
> (858)-882-3126
> Page
> (858)-635-1180
> Cell:
> (858) -449-7054
> email:
> [log in to unmask]
>
>Kyocera-Wireless Corp.
> 10300,
> Campus Point Drive
>
>
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>
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>__________________________________________________________________
> This message may contain information that
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> the individual or entity named above. If you are not the intended
> recipient, you may not copy, use or deliver this message to anyone. In
> such event, you should destroy the message and kindly notify the sender
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Thank-you
Mumtaz
D/ 252 - SMT Process and Component Quality
Bldg. V238E
Voice (858)-882-1967
Fax (858)-882-3126
Page (858)-635-1180
Cell: (858) -449-7054
email: [log in to unmask]
Kyocera-Wireless Corp.
10300, Campus Point Drive
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